Gas Milage & Octane .... simple poll & question

[bdub]

Okay, back to the gas mileage thing. On my last tank I got 33mpg with high test then I filled up with regular and only have 75 miles on that tank so I haven't refilled yet. And I forgot that the tank which I only got 27 on was the weekend I took the MSF advanced parking lot riding coarse so that may have affected the fuel consumption.
Although my plugs look like I running rich, the little light on my FBF ecu lights up (at idle and about 2000 to 2500) reading lean. Of coarse I have no idea if that is good/bad or indifferent. I'm still going to get it looked at by someone who knows more than me (Duck Pond) as soon as I get a chance. I have to get my truck running so if I have to leave my bike I can drive that (7 to 9 mpg). So, see even crappy mileage on my bike is better than my pick up.

[DuciD03]

June 2 08

ok ...  been doing experiments with Octanes; similar but different rides so there's a difference in consistency; I ran the 94 octane forever but seem to be getting better milage form the 89 octane .... I know I'm not getting optimum milage and have purchased belts to replace then I'll do a valve adjustment.

I'm liking the 89 comprimise;

also I'm pretty sure I'm noticing some gas stations have water in there gas ... hummmm!

This is a general summary below; could be affected by many factors.

March April 94 - 95 -105 Miles to 11-12 Litres
May 87 - 105 Miles to 11.5
May 89 - 113 miles to 12 Litres

Couple of other things effecting milage that people have pointed out;
.... gearing ... and the if I'm not mistaken 900's do seem to get great milage ... why?

[A.B]

S2R 800  14t sprocket, calculated 47 mpg at last fill up.

I do a mix of highway, in town, and back roads riding in NC.  I use 89 or 93 octane.  I'm certainly not conservative with the throttle.  Don't think i have ever gotten less than 40 mpg.

[rockaduc]

2005 S2R 800
52 miles mpg* bone stock
93 octane

*Although, I just added the full termi system w/ open airbox and DP ECU, so I will derby after my next full tank.

[Pedro]

M1000 with PC, K&N DP Cans etc

90 miles absolute max on about 11 litres, 70 miles if I'm in a hurry....

The fuel economy sucks but it is a laugh to ride!

[Ducnial]

S4RT w/DP & Slip-ons runs rich!  Gas mileage is better running premium, 92=32gpm, 89=28gpm.  One thing that really kills mileage is sitting in traffic.  >10min  out of a 25min commute=24mpg. 

[Duck-Stew]

My 750 cafe-racer consistently got 42-47mpg no matter how hard I rode it.

My 900 bobber got 55 to 60mpg, but had small carbs and VERY tall gearing.

[marvellous]

2006 S2R800 Dark

-> When it was stock, went 120 miles on one tank, light was on for the last 20 miles or so. The S2R1K that I was riding with, his light came on at least 10 miles sooner than mine, but I engine braked a LOT less than him on that ride.  No real commute in Spokane, WA, just riding for fun.  Started with 15 miles on the bike, ended with little over 1K.  Mileage = 47-50 mpg

-> New mods: Quat D Exbox Exhaust, 14t, and removed the O2.  Seems that I don't get quite the mileage that I used to.  The light came on at 84 miles earlier this week (usually around 88-94, I'm noticing).  I have a short commute now (Bend, OR), about 6-9 miles one way depending on my route.  Not a lot of riding for fun either, just commuting, sometimes on the Parkway (45 - 65 mph) or through town (35 mph).  About 1.1K miles on the bike to where it's at now, 2.3K.  Mileage = right at 45 mpg

Have always used 91 octane (vaguely remembering reading the manual and it actually might have said to use 94 octane, which is unavailable anywhere I've ridden), was at around 2000ft elevation and currently around 3800ft elevation.  Fairly mellow rider, but have adjusted how I ride in the last few months.  Used to shift around 4K rpm and now shift only after 5K rpm.  Both cities use ethanol in their gas.  Also, the hottest the bike has EVER gotten for me was 97 degrees F (hottest day of the year at 92)...  I'm assuming that it will get warmer when it actually GETS warm outside...

laters,
m

[flsurfdog]

2006 S2R800 Dark
Also, the hottest the bike has EVER gotten for me was 97 degrees F (hottest day of the year at 92)...  I'm assuming that it will get warmer when it actually GETS warm outside...

laters,
m

uhhh.... you sure about that F?  Cause my s2r1k doesn't read below 121, and typically runs between 220 and 250 tops......now if it's colder where you are....sounds like it is....then 97 C sounds about right

[scienceiscool]

2005 S4R (996)

I use midgrade (89) and get about 100 miles per 3 gal tank, in city use.  For highway and mountain riding it goes up to about 120 miles.

[MotoCreations]

My DesmoDevil prototype -- 944cc w/FCR and no airbox / filters and BoomTubes -- once got 57mpg w/5.8gallon tank = 330 miles -- ran out of gas then. (no reserve)

[ozmanyyy]

My DesmoDevil prototype -- 944cc w/FCR and no airbox / filters and BoomTubes -- once got 57mpg w/5.8gallon tank = 330 miles -- ran out of gas then. (no reserve)

I got about 52 mpg on my S2R1K on a trip where I was basically slabbing it for a couple of tankfuls. Was pleasantly surprised because I knew the plastic tanks have less capacity than the older models. Running full CF Arrows, stock everything else. Runs like a dream...

[marvellous]

uhhh.... you sure about that F?  Cause my s2r1k doesn't read below 121, and typically runs between 220 and 250 tops......now if it's colder where you are....sounds like it is....then 97 C sounds about right

I've only ridden the bike in cooler weather.  Purchased last year in September and take today, it's June and 57 degrees F... *shrugs*  We'll see when it actually GETS to be summer here how warm she'll get...

[Duc Fever]

I average right around 50 MPG on my S2R1K (mostly slabbing it to work and back), My wife gets 57/58 on her 695.

[He Man]

Went on a ride yesterday. I did 128 miles and filled up 2.2 gallons. On tank 2, which spilled over to today, i did 125 miles which i have yet to fill up yet, but the light went on about 3 miles from home. So im guessing if i filled her now, it would be ~2.7gals. The last 35miles were all city riding.

So tank 1 gave  me 58mpg and tank 2 would give me 46mpg.

I usually get 25-35mpg city depening on how much lane splitting and angry I am, and 40 with incity highways.